Question

State reason a runner presses the ground with his feet before he starts run

Answer 1

Answer:

I think it is because of Newton's third law of motion.

Explanation:

Newton's third law of Motion- Every action has as an equal and opposite reaction.

So, the runner is applying a force on the ground with its feet which is being an action on the ground.

The ground applies a same force to the runner's feet which is being a reaction. This reaction force by the ground helps him/her to start the race with a greater acceleration.

Hope it helps :)